Fawcett, H: Emily Wilde's Encyclopaedia of Faeries

But as Emily gets closer and closer to uncovering the secrets of the Hidden Ones -- the most elusive of all faeries -- lurking in the shadowy forest outside the town, she also finds herself on the trail of another mystery: Who is Wendell Bambleby, and what does he really want? To find the answer, she'll have to unlock the greatest mystery of all -- her own heart.